What really ticks me off is when I slap a frenzy potion on someone and all hell breaks loose... until the frenzy effect wears off and everyone goes back to normal.
Ahh, one of my favorite strange moments in Oblivion..Cast the frenzy spell at a Khajiit and Argonian.. then proceeded to follow them around watching the chase ensue, until gaurds stepped in, and killed them both. Sheathed their weapons, and walked away like nothing happened..
But, in all seriousness..I would like to see an option to explain your crime (theft) so many times, I've accidently picked something up that was marked steal.. suddenly, knifes at my throat for a loaf of bread! Hey, I'll pay for it guys, just chill out!